the president was back on the campaign trail yesterday making appearances in wisconsin, nevada and boulder, colorado. he also got endorsements from the mayor of new york city, who says he's doing it because the president, president obama, has done a lot on global warming. the president is slamming mitt romney, charging he would be a rubber stamp for the right wing. romney is ridiculing the president for wanting to create a new cabinet position, a secretary of business. >> i don't think what we need is another government bureau accurate that supposedly knows something about job creation. i think it would be a president who actually understands job creation. >> he's saying he's the candidate of change. let me tell you, wisconsin, we know what change looks like. and what the governor is offering sure ain't change. giving more power back to the biggest banks isn't change. leaving millions without health insurance isn't change. another $5 trillion tax cut that favors the wealthy isn't change. >> this week the president's campaign has also started pouring money into democratic leaning states lik